CN218812148U - Electrolysis trough gas cleaning processing system - Google Patents
Electrolysis trough gas cleaning processing system Download PDFInfo
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- CN218812148U CN218812148U CN202320068226.XU CN202320068226U CN218812148U CN 218812148 U CN218812148 U CN 218812148U CN 202320068226 U CN202320068226 U CN 202320068226U CN 218812148 U CN218812148 U CN 218812148U
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Abstract
The utility model discloses an electrolysis trough gas cleaning processing system, including arranging the electrolysis trough in aluminium electrolysis workshop in line, install the flame eye respectively in the exit of every electrolysis trough and discharge fume the pipe and the negative pressure pipe of discharging fume, all flame eyes discharge fume the pipe and discharge fume the pipe network through the flame eye and be connected with high concentration gas cleaning processing system, and all negative pressures discharge fume the pipe and pass through the negative pressure and discharge fume the pipe network and be connected with low concentration gas cleaning processing system. The utility model discloses the flue gas volume that the pipe was collected to discharging fume with each electrolysis trough flame eye is little, the flue gas that contains the high concentration pollutant and the flue gas volume that the negative pressure pipe was collected was big, the flue gas that contains the low concentration pollutant of discharging fume, adopts two sets of independent flue gas pipe networks to collect back stage treatment respectively, makes flue gas purification processing system's scale, running cost show and reduce.
Description
Technical Field
The utility model relates to an electrolysis trough gas cleaning processing system belongs to aluminium cell flue gas pollutant and collects and administer technical field.
Background
In the production process of the aluminum electrolytic cell using the carbon anode, the amount of gas generated by the electrochemical reaction is small (the main component is CO) 2 The yield is 3/4, the conversion is 622.2Nm 3 T · Al, lower volume of HF gas as the main contaminant). The method adopts the smoke collection mode of the electrolytic cell at the present stage, and in order to ensure the smoke collection efficiency of the electrolytic cell, a certain negative pressure needs to be ensured in the cell cover, so that a large amount of ambient air enters the cell cover, and the ambient air and smoke (containing pollutants) generated by electrolytic reaction enter the electrolytic smoke purification system together for treatment. In practical engineering, the exhaust smoke discharge of the electrolytic cell is generally 65,000Nm according to different cell types 3 above/t-Al, where the proportion of contaminants is very low, also determinesThe traditional electrolytic bath flue gas has the characteristics of large generation amount and low pollutant concentration, such as: fluoride concentration 200mg/Nm 3 (ii) a Using an anode with a sulfur content of 2%, SO 2 About 200mg/Nm 3 。
As described above, in the conventional technology, flue gas generated by the electrolytic cell enters the electrolytic cell flue gas purification system through a set of flue gas exhaust pipe network for purification treatment, although the concentration of pollutants in the flue gas of the electrolytic cell is low, the flue gas amount is large, and the volume and scale of the purification treatment facility need to be configured according to the flue gas amount, for example, the filter area of the dust remover of the electrolytic flue gas purification system, the diameter of the desulfurizing tower and the flue gas amount are in a proportional increase relationship, so that the volume and scale of the electrolytic cell flue gas purification treatment facility in the conventional technology are large, and the system occupies a large area and has large investment. In addition, because the amount of the flue gas of the electrolytic cell is huge, the work load of a smoke exhaust fan for conveying the flue gas of the electrolytic cell in the flue gas purification system is correspondingly large, the cost of the smoke exhaust fan is increased, and the power consumption in operation is increased, for example, in the traditional technology, the energy consumption of the smoke exhaust fan of the electrolytic flue gas purification system is up to more than 80%.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an electrolysis trough gas cleaning processing system, this system adopt two sets of independent flue gas pipe networks to collect hierarchical processing behind the flue gas respectively, make gas cleaning processing system's scale, running cost show and reduce.
The technical scheme of the utility model: the utility model provides an electrolysis trough flue gas purification processing system, includes the electrolysis trough of arranging in line in aluminium electrolysis workshop, installs fire hole exhaust pipe and negative pressure exhaust pipe respectively in the exit of every electrolysis trough, and all fire hole exhaust pipes are connected with high concentration flue gas purification processing system through fire hole pipe network of discharging fume, and all negative pressure exhaust pipes are connected with low concentration flue gas purification processing system through the negative pressure pipe network of discharging fume.
Further, a waste heat utilization module is connected to the fire hole smoke exhaust pipe network.
Further, the pipe diameter of the fire hole smoke exhaust pipe network is smaller than that of the negative pressure smoke exhaust pipe network.
Due to the adoption of the technical scheme, the utility model has the advantages of: the utility model discloses the flue gas volume that the pipe was collected to discharging fume with each electrolysis trough flame eye is little, the flue gas that contains the high concentration pollutant and the flue gas volume that the negative pressure pipe was collected was big, the flue gas that contains the low concentration pollutant of discharging fume, adopts two sets of independent flue gas pipe networks to collect back stage treatment respectively, makes flue gas purification processing system's scale, running cost show and reduce. Meanwhile, because the flue gas volume collected by the fire hole exhaust pipe is small and the conveying energy consumption is low, the flue gas in the whole electrolytic workshop can be intensively treated by adopting a set of high-concentration flue gas purification treatment system, the original multipoint feeding of the alumina supply facility is changed into a single point, and the construction cost and the operation cost of the alumina supply facility are reduced.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
Reference numerals: 1-fire hole smoke exhaust pipe, 2-negative pressure smoke exhaust pipe, 3-fire hole smoke exhaust pipe network, 4-negative pressure smoke exhaust pipe network, 5-low concentration smoke purification treatment system, 6-waste heat utilization module, 7-high concentration smoke purification treatment system and 8-fresh alumina supply facility
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail with reference to the accompanying drawings and examples.
As shown in figure 1, the electrolytic cell flue gas purification treatment system comprises electrolytic cells 9 arranged in an aluminum electrolysis workshop in a row, wherein a fire hole smoke exhaust pipe 1 and a negative pressure smoke exhaust pipe 2 are respectively arranged at the outlet of each electrolytic cell 9, all the fire hole smoke exhaust pipes 1 are connected with a high-concentration flue gas purification treatment system 7 through a fire hole smoke exhaust pipe network 3, and all the negative pressure smoke exhaust pipes 2 are connected with a low-concentration flue gas purification treatment system 5 through a negative pressure smoke exhaust pipe network 4. And the fire hole smoke exhaust pipe network 3 is connected with a waste heat utilization module 6. The pipe diameter of the fire hole smoke exhaust pipe network 3 is smaller than that of the negative pressure smoke exhaust pipe network 4.
Firstly, a fire hole smoke exhaust pipe 1 and a negative pressure smoke exhaust pipe 2 are respectively arranged at the outlet of each electrolytic cell 9 of each aluminum electrolysis workshop, then all the fire hole smoke exhaust pipes 1 are connected with a high-concentration smoke purification treatment system 7 through a fire hole smoke exhaust pipe network 3, the high-concentration smoke purification treatment system 7 is adopted to treat smoke with high pollutant concentration, all the negative pressure smoke exhaust pipes 2 are connected with a low-concentration smoke purification treatment system 5 through a negative pressure smoke exhaust pipe network 4, and the low-concentration smoke purification treatment system 5 is adopted to treat smoke with low pollutant concentration, so that the purpose of smoke grading treatment is realized. Each aluminum electrolysis workshop is provided with a set of low-concentration flue gas purification treatment system 5, and all aluminum electrolysis workshops share a set of high-concentration flue gas purification treatment system 7.
The embodiment of the utility model provides a:
generally, two lines of aluminum electrolysis workshops arranged in parallel form an electrolysis series, the two lines of electrolysis workshops are connected through a plurality of galleries, and a plurality of aluminum electrolysis cells 9 are arranged in the two lines of electrolysis workshops in an array mode. As shown in the electrolytic series shown in figure 1, the vacant ground between the electrolytic plants 1# and 2# is divided into 3 vacant grounds by the vestibule 1# to 4# and the electrolytic cell flue gas purification treatment system can be arranged on the 3 vacant grounds. When the distance between two lines of electrolytic cells is relatively close, the purification system can be arranged on any side of the two lines of cells.
As shown in figure 2, a fire hole smoke exhaust pipe 1 and a negative pressure smoke exhaust pipe 2 are respectively arranged at the outlet of each electrolytic cell 9. And the flue gas collected by the fire hole smoke exhaust pipe 1 and the negative pressure smoke exhaust pipe 2 of a plurality of electrolytic cells is collected by adopting an independent fire hole smoke exhaust pipe network 3 and a negative pressure smoke exhaust pipe network 4. Wherein, the flue gas of the fire hole smoke exhaust pipe 1 of each electrolytic cell 9 is collected by the fire hole smoke exhaust pipe network 3, the concentration of the pollutants in the flue gas is high, but the flue gas amount is small, and the scale of the high-concentration flue gas purification treatment system 7 for treating the flue gas is obviously smaller than that of the prior art; the smoke of the negative pressure smoke exhaust pipe 2 of each electrolytic cell 9 is collected by the negative pressure smoke exhaust pipe network 4, the pollutant concentration in the negative pressure smoke exhaust pipe network 4 is low, the pollutant can be purified by adopting a low treatment cost mode, and even the pollutant emission standard requirements of some places can be met without purification treatment.
Because the flue gas containing pollutants with different concentrations is collected by two sets of independent fire hole smoke exhaust pipes 3 and negative pressure smoke exhaust pipe networks 4, the graded treatment of the flue gas can be realized.
By usingAfter independent fire hole smoke exhaust pipe network 3 and negative pressure smoke exhaust pipe network 4 collect the fire hole that contains high concentration pollutant respectively and discharge fume and the negative pressure that contains the low concentration pollutant and discharge fume, high concentration flue gas volume can reduce to very low level, if: the smoke discharge amount of the existing ton of aluminum is 1/5, and is about 10000-15000 Nm 3 At a level of/tAl, the volume of the flue gas treatment system requiring the intensive treatment can be reduced to about 1/5 of the prior art, such as: the sectional area of the desulfurizing tower can be reduced to 1/5 of that of the prior art; the smoke volume in the negative pressure smoke exhaust pipe 2 is large, such as: 4/5 of the current smoke discharge amount of each ton of aluminum, about 50000-55000 Nm 3 The level of/tAl, but due to low temperature and low pollutant concentration, the pollutant can be purified by a low-treatment-cost mode locally and locally, and even the pollutant emission standard requirements of some places can be met without treatment, such as: it can be clear that the part of the flue gas can meet the discharge standard of SO in most domestic areas without a desulfurization system for desulfurization and purification 2 The emission concentration limit value is required, so that a desulfurization system is not required to be arranged for purifying and treating the part of flue gas, and the project construction and operation cost is obviously reduced.
Because the amount of flue gas conveyed by the negative pressure smoke exhaust pipe network 3 is large, and the conveying energy consumption is high, a low-concentration flue gas purification treatment system 5 is arranged nearby for treatment according to the arrangement of the aluminum electrolysis workshop. As shown in fig. 1, 3 sets of low concentration flue gas purification treatment systems 5 are provided.
Because the flue gas temperature that the pipe network 4 that discharges fume of burner was collected is high, through adopting waste heat utilization module 6, retrieve the heat in the flue gas and utilize, reduce the flue gas temperature that the burner discharged fume simultaneously. The volume of the flue gas cooled by the waste heat utilization module 6 is reduced, the pipe diameter of the fire hole smoke exhaust pipe network 3 can be reduced, and the conveying cost is reduced; because the flue gas volume that the fire hole smoke exhaust pipe network 3 was collected is little, carries the energy consumption low, so can adopt the mode of the high concentration flue gas purification processing system 7 of concentrated arrangement, can reduce investment and working costs. As shown in fig. 1, a set of high-concentration flue gas purification treatment system 7 is arranged after the fire hole smoke exhaust pipe network 3 of the whole electrolysis series is collected.
After adopting electrolysis trough flue gas hierarchical processing mode, can be used for purifying the high concentration flue gas that the fiery eye smoke exhaust pipe network 3 collected with whole aluminium oxide that electrolysis technology production used earlier, because high concentration flue gas total amount is showing the reduction than prior art's total flue gas volume, so adsorbent concentration is showing and is promoting in the flue gas, simultaneously, because pollutant concentration is high, the condition that adsorption reaction takes place can show and improve, and clean system purification efficiency will be higher than prior art. Such as: the generated flue gas quantity is reduced to 1/5 of the existing flue gas quantity, and the pollutant concentration in the flue gas is improved by 5 times. Because the total amount of the alumina adsorbent is unchanged, the concentration of the adsorbent is improved by 5 times, so that the adsorption reaction condition can be obviously improved, and the adsorption reaction efficiency can be improved.
Because the flue gas volume that the flame hole smoke exhaust pipe network 3 was collected is little, carries the energy consumption low, so can adopt the mode of handling whole electrolysis shop flue gas centralized, fresh alumina supply facility 8 changes the single-point from original multiple feeding, and fresh alumina supply facility 8 construction cost, running cost reduce.
After the electrolytic cell flue gas grading treatment mode is adopted, the specific treatment modes selected by the low-concentration pollutant flue gas purification treatment system 5 and the high-concentration pollutant flue gas purification treatment system 7 can be selected according to the pollutant emission requirements of the sites of the project.
Claims (3)
1. An electrolysis cell flue gas purification treatment system comprises electrolysis cells (9) arranged in an aluminum electrolysis plant in a row, and is characterized in that: the fire hole smoke exhaust pipe (1) and the negative pressure smoke exhaust pipe (2) are respectively arranged at the outlet of each electrolytic cell (9), all the fire hole smoke exhaust pipes (1) are connected with the high-concentration smoke purification treatment system (7) through a fire hole smoke exhaust pipe network (3), and all the negative pressure smoke exhaust pipes (2) are connected with the low-concentration smoke purification treatment system (5) through a negative pressure smoke exhaust pipe network (4).
2. The electrolyzer flue gas purification treatment system according to claim 1, characterized in that: and the fire hole smoke exhaust pipe network (3) is connected with a waste heat utilization module (6).
3. The electrolyzer flue gas purification treatment system according to claim 1, characterized in that: the pipe diameter of the fire hole smoke exhaust pipe network (3) is smaller than that of the negative pressure smoke exhaust pipe network (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320068226.XU CN218812148U (en) | 2023-01-10 | 2023-01-10 | Electrolysis trough gas cleaning processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320068226.XU CN218812148U (en) | 2023-01-10 | 2023-01-10 | Electrolysis trough gas cleaning processing system |
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| CN218812148U true CN218812148U (en) | 2023-04-07 |
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| CN202320068226.XU Active CN218812148U (en) | 2023-01-10 | 2023-01-10 | Electrolysis trough gas cleaning processing system |
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2023
- 2023-01-10 CN CN202320068226.XU patent/CN218812148U/en active Active
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